DA - Support for alternative DA provider

[fluentcrafter]

Description

Investigate/Design a solution for Linea to support other means of Data Availability than L1 Blobs

• Rollup Contract
• Coordinator
• Prover

Motivation

Allow other Rollup providers of Linea Stack to use different DA Solutions

Tasks

• Create Design Document for Smart Contract, Coordinator and Prover Implementation / Integration

Acceptance criteria

• Design agreed and accepted by all component teams

Risks

• These are risks that may prevent completion of the task as well as areas to pay special attention to